Process and apparatus for masticating rubber



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' H. c. YOUNG ET AL P800355 AND APPARATUS FOB. MASTICATING RUBBER FiledJan. 31. 1924 2 Sheets-Swat 1' n 5% WH m MV/T MM 5M m w M AM W M, Q; v10R R W A Hv Pae iedyoct. 6, 192 s UNITED STA TIES : HARRY; cLARAN'cniroUNe. or shr'roiv, AND eoLm -maonnrn; or. retire-11m; ENG- LAND,AssIeNoRsmo' DUNLOP'TIBE AND RUBBER, ccaronar 'onjor MERICA 0F I Borrlu.-o, new YQRK,aconrosarronornnwxonx; J Y i raocrss ani) grannies-r01;mas'rrcarme, RUBB R;

, Application filed January 51, 1924. "Serial no. mm.-

To'aZZ whom it may concern; V v,

Be' it known that we, HARRY CLAnANcn YOUNG and COLIN MACBETII,subjects-of the" King of Great Britain, residing in Sutton,

in the county of Warwicli',.England, and Four Oaks, in the county ofWarwick, England, respectively, have invented certain new and usefulln'i'p ovements-in Processes and Apparatus for Masticating Rubber, of; I

lent position with -regard to the masticating which the following'is aspecification. Raw rubber for use in 'manufactureafter being washed isinasti'cated to render it soft and pliable. To efiect' this end it ispassedbetween rollers in a masticating mill. To

obtain the best results it is essential that the; rubber shouldpassthrough themasticat'ing mill a-number of timeS, being cooled down fore,takes a considerable time.

According to this --invention between each operation. The proces gthereror rolls is automatically cooled-land returned for a second mastication,this operation b'e-f V fawayby the roll er' 5. The belt 7 passes over 1the*;top o;f' t he drum 1/and under the drum 1 and Tove'kthedrumtl". Itisthen carried ing repeated until the mastication is carried to therequired degree, when the rubber, iS'. withdrawn. In the machineillustratedthe rubber is placed between the rolls ofjamasticating milland after the :same has' 'been;

rendered pliable it falls in the form ofa sheet onto a moving beltorconveyor which is situated directly underneath the rolls of the mill,The belt conveys the rubber over 7 or under a. seiies of drums orrollers which" are preferably providefl with 5 'table cooling means. Therubber In .ahowever, be cooled by exposure to When the rubber hastraversed e viiull'number of drums the belt is arranged-so asto j allowit to fall into thenip ofthe-rollers of,

the masticating mill. The generalxarrange-i, ment and the numbei-of thecooling drums may be varied as desired, that is they maybe arranged onthe ground level, or where.

economy in floor space is of importance, the

drums may be arranged vertically" one on" Fig. 2 is 'a persp ectiveview'jof the same I y method shown in Figs. and- 2- water'1 s eg j fromthe oppo t 9. 4

ilpon the belt.

means;

1 Fig. 3 isa side elevation ofa form of the apparatus wherein rollersare. employed without specific cooling means;

Fig. ,4; is aside elevation-of a modification of theapparatus shown inFig. 1 wherein the cooling drums are'vertically disposed.

to j

.VVith reference to Figs. 1 and 2, a series of six cooling drums 1 1,1", 1, 1, 1 are arranged in two; rows of three in a convenmill 2. Anendless belt or conveyor 3 which -15 made of such material as to allowheat to escape readilyis arranged over rollers 4, 5 I and 6. Thatportion of the belt between the rollers Land-his conveyed under the'drum1,,overthedrum'liandlun'der the drum 1", and upwards to the roller 5,travelling over the surfaee o'f the drum 1. A secondbelt 7 moves irom'fa: roller Sand a tension roller the rubber after passing through themasticating mill.

"thefbelt 3 on the top of the drum 1, the twobelts then-travel u er thedrum l 'and uptwardstofii adrum. when the belt 3 is taken the I n 'nd upto the druml"v where the bait Zn oif. by the =roller'5. The rubthey thenlies oh the surfacepfthe' belt 7 and is conveyed over the 'draini'. 1and under'the drum-.1 andithen upwards over the roll .1?

tothe 'rolle1118, so thatit falls into the nip" iof'the rollsof:themasticating'mill.

1 Driving means are provided fironr the main shaft'jIAi-otthemasticatingby means of ennpenabeltB to a pulley G situated at oneend ofthe'shaft.ofthedrum tulslifrietlona I -Meaiis may be provided for ci rculatingcooling fl'uid th'nough the drums. In the f conveyed between t e belts 3and 7 under '101 1" and .a belt 1) drives the; drum 1? front theshaftofthe drum. 1". The driven drums -drive the wave or belts '3-and7 antithese in y drivethe drums 1, 1', 1

' ;the.roller 20back'to the roller 1d; A further r belt'iolzseriesofbelts 17 moving in similar mitted to each drum separately through thepipes at one side of the machine to the" levels- 10.

At the opposite ends of the drums the water-is siphoned from the drums-into the vessels -11 at precisely the rate at which it is admitted tothe said drums, .'so maintaining a. constant new at levels 10. 'Aplatform is preferably erected'over the.

- moving belt 3"between the drumsand the masticating mill on which the.operator may stand, but this is 'not-shown. v

tieating mill-.and round a roller-14. It is then taken awayby a roller15 and passes overaroller l 6 back to the ro ler "13. A,

. further belt or conveyor- 17 travels fromthe roller 14; round theroller l8 and .is then taken away by the roller 19 passing round vmanner to the belt 1? may be arranged to form aniupward zig-zag courseasshown.

An. endless'beltor conveyor 21 travels from the '-roll er 22 to theroller 23. "Belovv'the roller- 23.; a further endless belt or conveyor-24: is situated, travelling in a horizontal .di-

" rection about the rollers 25 and25f. v Under neaththe beltg24afurtherfbelt-or series of belts 24 may be-placed. The belts 2-1 and 24moving in opposite directions horizon tally, A' further belt 2,7 travelsfrom the I .roller.28 to-the roller 29 which is situated theinasticatingmill,

immediately. abovev the'nip ofthe rolls 2 of v The rubber Shaving passedthrough roll f the masticating niill 'falls on to the belt, 112 and isconveyed up to and round the roll-f er 14:,the rubber then .lies oilthe. surface of the belt 17 and is conveyed round the rolls'18 on to thebelt 17 A seriesof belts is conveyed by thebelt- 21 to the roller'23where it is allowed to drop on to the belt 24,

The belt 24 conveys therubber to the roller I where the said rubber isallowedto fall on to the belt 24 and is..conveyed in; the op pos'itedirection tothe roller 26. A series of -.belt s 24 and 2 1 may be.provided as desired causing the rubber to 'be conveyed down-.-.

wards in a series of oppositehorizontal ldi' rections. On falling onto'the belt 27' the rubber is conveyed to; the roller29 and is a1-.

lowed to dropinto the nip of the rolls 20f I y r pa t y- 1 d t i "Q imb0dimentsthemasticating-mill;

so driving the masticating'inill, having-a series of pulleys connectedby? crossed belts to therollers. 20and by openbeltsto the rollers 16.

- Driving means may consist of a 'shaft 30' driven with an open beltfrom the shaft 30 4 The shaft'3O is -refer-ably situated underro1-ls.2of-the niasti'cating mill. "17 and 17 may be provided as desired,causing the rubber to take anupward zig-zagcourse. Onreaching the roller22 the rubber partin neath the belts ta ing the rubber in anfup wardco'urse." further shaft-31,- alsd driven I. I'

from the main drive 30 by an open belt, s situatedabove the belts takingtherubbe'r 1n a downward ,coursea'r'id has a series'of pul' leysconnected by crossed belts to the rollers- 23,- 25 and 28,":md'by anopen belt -to the roller 26. {j a f With reference to .Fig. 4, three'eoolmg; drums 32, 3.2.and 32! are arranged-vertical .ly-one aboveanother.v Thedrunismay be cooled by circulating .water' therethroughsubstantially; in] the nanner described: lio'r- Fig; 1, but'this isnotshown-in the ,draw- -ings. An endless belt-or conveyor 33 travelsfrom a roller 34 which is situated under-;

neatlrthe rollers 2-of1a inastica'ting mill, aroundthecooling.drum32'andjupwards. in a' zi'g zageourse' round the drums 32?and 32 ,';wvhenbe' it'is. taken all by a, roller .3'5'-ear+i ri'edlbynieans'of ro11ers36 and-37 back to j therollen' 34. Y Afurtliefrfendless "belt or, co nveyor 38jtravels fr'onra roller39.:indmeets I thefibelt .33 under ithe' cooling drum: 32,.

travelling iipwards round the drums '32 32 in ah-upward-zigfzagdirection. Having -'9 left the dr'un132", it'returns to the 'roller. 39which'is situated'inunediately abnye thenipof'the rollers 2 of themasticating -:,The rubbert) having passed =-thrdugh the roll'ers'2 ofthe mastieating-mill in}! "sheet form on totheibeltv33 and is Ieonf- Y ythe :C 0lingd1um 32' where it met and'held by the belt 38. ,The' rubber1s then conveyed between the two'ibelts 33- and' 38 i'n-an upwardzig-zag courseabout the.-

cooling; drum 32," 32and 32'.'-' Having. reached the top of the drum" 32the belt 33is. led ofi' by'means' ofthe pulley-'35-and the rubber 9lies-upon the surface of thebelt 38- and is. conveyed down to the roller39.]."It 16 i 3 isthen-allovved to" -fall into'the 'nip "of-theta,Drivin means. vmay be provided, ad an openelt :from the main drivingshare 370f' the inasticating -mill "to. a. "pulley:

mounted at one end ofthe roller 37 and a crossed belt to fa similarpulley mounted at. one end ofthe roller 39. f

The whole arrangement of the-timing. belts andc'oolingd'rums may beeither-an-in tegral "portion of the masticatingi mill, or J may. be.arranged separately in-a. Conven ent position :o'n ,a suitable stand. Itwill. be-

'unders'tood'that' we-donot limit'Tfiuiselvesf to' theparticular-numberor. armsma: J

tollovv ng claims, 1?

What we claim is 1. The method of treating raw rubber which consists inmasticating it a number of times and passing-it automaticallx be--operation to and to the next .catcd, and repeating such; operations tothe desired extent.

3. An apparatus "for treating raw rubber comprising a masticating milland a con-.

veyor receiving it from said mill and passing it through coolingmechanism contmuouslg to a pointwhere it is to be agam masticate 4. Anapparatus for treatin raw rubber comprising a mast-icating mil and aconveyor receiving it from said mill and passing it through coolingmechanism continuously to the entrance or'osaid masticating mill.

The apparatus oi claim 3,the cooling to and over' said rollers.

- veying it upward mechanism including drums with means for circulatinga cooling fluid therethrough.

6. The apparatus of claim 3, the cooling mechanism including rollers ancarrying the rubber over said rollers.

7. The apparatus of claim 3, the cooling mechanism including rollers anda pair of belts embracing the rubber and conveying it 8. The apparatusof claim 3, the cooling mechanism including rollers arranged one aboveanother. I

9. An apparatus for treating raw-rubber comprising a masticating mi anda conveyor receiving-it from said mill and passing it through coolingmechanism continuously to a point where it is ticated, .the coolingmechanism including rollers arranged one above another, and a pair ofbelts embracing the rubber and conto the successive vertically arrangedrollers.

- In witness whereof, we have hereunto signed our names.

HARRY CLARANCE YOUNG. COLIN MACBETH.

d belts for to be again masv

